private void SaveRenderTextureToPNG(Texture inputTex, string file)

    {

        RenderTexture temp = RenderTexture.GetTemporary(inputTex.width, inputTex.height, , RenderTextureFormat.ARGB32);

        Graphics.Blit(inputTex, temp);

        Texture2D tex2D = GetRTPixels(temp);

        RenderTexture.ReleaseTemporary(temp);

        File.WriteAllBytes(file, tex2D.EncodeToPNG());

    }

    private Texture2D GetRTPixels(RenderTexture rt)

    {

        RenderTexture currentActiveRT = RenderTexture.active;

        RenderTexture.active = rt;

        Texture2D tex = new Texture2D(rt.width, rt.height);

        tex.ReadPixels(new Rect(, , tex.width, tex.height), , );

        RenderTexture.active = currentActiveRT;

        return tex;

    }

            Color[] colors = tex.GetPixels(capx, capy, capwidth, capheight);

            System.Array.Reverse(colors, , colors.Length);

            Texture2D t = new Texture2D(capwidth, capheight, TextureFormat.RGB24, true);

            //Debug.Log("Pixel size:" + capx + " " + capy + " " + capwidth + " " + capheight);

            //t.ReadPixels(new Rect(capx, capy, capwidth, capheight), 0, 0, false);

            //for (int i = 0; i < capwidth; i++)

            //{

            //    for(int j=0;j<capheight;j++)

            //    {

            //        Color temp = t.GetPixel(i, j);

            //        t.SetPixel(i,j,)

            //    }

            //}

            t.SetPixels(colors);

            t.Apply();